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Dew Point Monitors

Used with desiccant and refrigerant air dryers, dew point monitors provide a constant display of your dew point level and an alarm when levels are out of range. Just plug and play our easily replaceable hygrosensor, which is the most competitively priced in the market (no calibration required). Custom packages available for many different applications, including industrial, commercial and medical. We offer many different types and temperature ranges available. Other optional ranges are +20°C to -120°C.



  • Easy to read digital dew point display
  • Dry alarm contacts included
  • Celsius or Fahrenheit displays available
  • Up to 150 PSIG
  • Optional up to 710 PSIG
  • Included in all Purge Economizer Control packages
  • QPS special inspection approval (120V units)
  • 4-20 mA or 0-5 VDC linear analog output (convertible)
  • Adjustable output contact set point anywhere within the dew point range
  • Easy, cost-efficient hygrosensor replacement plug-in pin and socket installation

Custom Options

  • High humidity alarms
  • Dry contacts
  • Optional ranges with HMI display


  • Desiccant dryers
  • Refrigerant dryers
  • PSA Nitrogen Gas Generator, PSA Oxygen Gas Generator, Compressed Air Auditing

1 year warranty included

Model NumberDew Point RangeElectrical RequiredEnclosure SizeEnclosure TypeOutput Contact Rating 10AResponse TimeBrochure PDF
HYG-121005-S-1-9 to -40 ºC1/60/120V, 10W12 x 10 x 5 inNEMA-12120 V 24 VDC3 seconds to 65%Download
HYG-121005-S-R-12 to +21 ºC1/60/120V, 10W12 x 10 x 5 inNEMA-12120 V 24 VDC3 seconds to 65%Download
HYG-080604-S-1-9 to -40 ºC24 VDC8 x 6 x 4 inNEMA-4X120 V 24 VDC3 seconds to 65%Download

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